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We have studied the effect of Zr doping, from 0% to 100%, on the ferroelectric properties of HfO2. Amorphous HfxZr1−xO2 on TiN and Si substrates is deposited using atomic layer deposition (ALD) and then annealed in a rapid thermal processing (RTP) tool while capped by 20 nm of sputtered TiN. Based on our experiments, Zr doping of up to 50% results in ferroelectricity in polycrystalline HfxZr1−xO2,...
Purpose: To assess the relative influence of genetic and environmental factors on optic disc size and cup/disc ratio in healthy eyes.
Methods: A sample of 55 monozygotic and 50 dizygotic healthy twin pairs aged 20–46, all having the same sex within pairs (47 pairs were male) had optic discs measured from colour fundus photographs according to the Wisconsin Protocol. Structural equation modelling...
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